DNS Alias / Database name

Hi folks!
I have one question, is it possible to create alias name on DNS server for database (instance) name? I have test db on one machine and after migration i want to use alias name which is called test for second database server machine without changing host name locally or in application.
Is thios possible and what to put in tnsnames?
I have already tried but i fails.
I have done :
Created alias name TEST on DNS name and in its description put host name of server, and ping of it went ok
I wanted to test is this working in case of dblink createion and recevie error Error : ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
I have put in tnsnames this:
TEST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = TEST)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = test)
If this situation is specific please could you provide me correct entry for my case in tnsnames file?
Thanks!

rootsman wrote:
Hi folks!
I have one question, is it possible to create alias name on DNS server for database (instance) name? I have test db on one machine and after migration i want to use alias name which is called test for second database server machine without changing host name locally or in application.
Is thios possible and what to put in tnsnames?
I have already tried but i fails.
I have done :
Created alias name TEST on DNS name and in its description put host name of server, and ping of it went ok
I wanted to test is this working in case of dblink createion and recevie error Error : ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
I have put in tnsnames this:
TEST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = TEST)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = test)
If this situation is specific please could you provide me correct entry for my case in tnsnames file?
Thanks!Just to expand and clarify a bit of what LkrBrn posted ..
In your above TNSNAMES.ORA entry, note the following:
HOST=TEST "TEST" must resolve (via dns or local hosts file) to the ip address of a machine hosting an oracle listener
PORT=1521 means the target machine ('TEST', in your case) must be listening on port 1521
SERVICE_NAME=test means the listener using port 1521 on server 'TEST' must know of a database service called "test"
whereas the entry name ("TEST = ...") can be anything, but that is the name which the client uses to refer to the database to which it wants to connect.

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Hi All,
Solution manager is running on win2003 server with db2 database.When i m trying to connect db2 from command promt i m getting error.I m following these step.
1.Loging with db2 user
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C:\>db2 get snapshot for dbm
            Database Manager Snapshot
Node name                                      =
Node type                                      = Enterprise Server Edition with
local and remote clients
Instance name                                  = DB2
Number of database partitions in DB2 instance = 1
Database manager status                        = Active
Product name                                   = DB2 v9.1.600.703
Service level                                  = s081007 (WR21415)
Private Sort heap allocated                    = 0
Private Sort heap high water mark        = 0
Post threshold sorts                                = Not Collected
Piped sorts requested                          = 0
Piped sorts accepted                           = 0
Start Database Manager timestamp      = 07/29/2010 11:35:25.534766
Last reset timestamp                           =
Snapshot timestamp                             = 08/03/2010 18:43:14.492590
Remote connections to db manager               = 0
Remote connections executing in db manager     = 0
Local connections                              = 0
Local connections executing in db manager      = 0
Active local databases                         = 0
High water mark for agents registered          = 2
High water mark for agents waiting for a token = 0
Agents registered                              = 2
Agents waiting for a token                     = 0
Idle agents                                    = 0
Committed private Memory (Bytes)               = 11141120
Switch list for db partition number 0
Buffer Pool Activity Information (BUFFERPOOL) = OFF
Lock Information                        (LOCK) = OFF
Sorting Information                     (SORT) = OFF
SQL Statement Information          (STATEMENT) = OFF
Table Activity Information             (TABLE) = OFF
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Unit of Work Information                 (UOW) = OFF
Agents assigned from pool                      = 2542
Agents created from empty pool                 = 4
Agents stolen from another application         = 0
High water mark for coordinating agents        = 2
Max agents overflow                            = 0
Hash joins after heap threshold exceeded       = 0
Total number of gateway connections            = 0
Current number of gateway connections          = 0
Gateway connections waiting for host reply     = 0
Gateway connections waiting for client request = 0
Gateway connection pool agents stolen          = 0
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       Current size (bytes)                    = 65536
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REgards

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C:\Users\Administrator.MAXXMOBILEDLH>db2dart db2smn /CHST /WHAT DBBP OFF
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DNS alias name for portal server

Hi
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I have added this alias hostname configuration in
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MBAM 2.5 SPN Issue with DNS alias and reporting

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When we did this we initially got stuck even logging on with single sign-on. we made a change to the endpoint address in the web.config and pointed it to the alias -- this resolved that issue.
However now when trying to open any one of the reports we get the resource can not be found http 404 error.
Is this fixable by changing something in a config file somewhere or do I need rebuild the servers and reinstall?

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Today we uninstalled and reinstalled/configured IIS, the Administration and Monitoring website, and the self-service portal.<o:p></o:p>
We no longer get an error when clicking on one of the 3 reports. Instead it does nothing. If I choose to open it in another tab or window it
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DNS Alias to named instance

Hi, I have been recommended to create DNS aliases for the sql server instances so it be much more flexible for us to later migrated databases from server/instances to other server/instances... I really like this approach, but my SQL server consist of several
named intances, one for every service/application.
Its easy to create a dns alias for a server name, but is it even possible to create DNS aliases for each named instance?
And question two, is it possible to run all named instances on port 1433?
Thanks in advance.

Its easy to create a dns alias for a server name, but is it even possible to create DNS aliases for each named instance?
A DNS entry will resolve the host name to an IP address, but the instance name (or port number) will still need to be specified in client connection strings. This will allow you to move a named instance to a different server without changing client
connection strings as long as you retain the same instance name (or port number if you use a port number instead of instance name).
For example, if you have 2 named instances on SERVERA named INSTANCE1 and INSTANCE2, you could create DNS records INSTANCE1.EXAMPLE.COM and INSTANCE2.EXAMPLE.COM both pointing to SERVERA. The client connection string will still need to specify
the instance name (e.g. INSTANCE1.EXAMPLE.COM\INSTANCE1 and INSTANCE2.EXAMPLE.COM\INSTANCE2). That would allow you to move a named instance to different host transparently with only a DNS change (e.g. move INSTANCE1 to SERVERB and change INSTANCE1.EXAMPLE.COM
to point to SERVERB.
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Dan Guzman, SQL Server MVP, http://www.dbdelta.com

Problem using alias field names in a sql query

Hello,
I have a question regarding a simple Oracle database SQL query writeup:
In the following (badly written but properly working) SQL query:
Query 1:
select
soe.field1,
(soe.field2 + soe.field3) as field4,
(soe.field5 - (soe.field2 + soe.field3)) as field6,
(select comp.parValue*soe.field7
from
CompTable comp) as parValue,
(select soe.field8 - (comp.parValue*soe.field7+ soe.field9)
from
CompTable comp) as field10
from
SomeTable soe
PROBLEM 1:
I am re writing the code (soe.field2 + soe.field3) to get the alias field4 or column name field4 that I have created on the fly in the previously for use with the following fields. Can't I rewrite the query as follows. There is something simple missing!
Query 2:
select
soe.field1,
(soe.field2 + soe.field3) as field4,
soe.field5 - field4 as field6, <<< field4 does not work here
(select
comp.parValue*soe.field7
from
CompTable comp) as parValue,
(select
soe.field8 - (comp.parValue*soe.field7+ soe.field9)
from
CompTable comp) as field10
from
SomeTable soe
PROBLEM 2:
Similar to the above problem, I was thinking to get a field parValue out of the CompTable table and re-use many times rather than the code shown in Query 1:
Query 3:
select
soe.field1,
(soe.field2 + soe.field3) as field4,
soe.field5 - field4 as field6,
soe.field7* (select comp.parValue from CompTable comp) as parValue1,
soe.field8 - (parValue1*soe.field7+ soe.field9) as field10 <<<< parvalue1 does not work here
parValue1*soe.field9 as TaxCondition <<<< parvalue1 does not work here
from
SomeTable soe
See that the query becomes so simple, but the above query does not work. There is something fundamentally wrong in my usage of the alias field names in creating other fields. The Query1 seems to be the only working option but its very slow as I am redoing and re-writing the whole code again and again to get the parValue field out of the CompTable table for use to create many other fields.
I will appreciate if you can guide me in the right direction on this issue.
Thanks and Regards
Rama

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Views to check the catalog database name from target database.

Hi,
Please help me to find view to check the catalog database name which is connected to my target database because I am new to the current environment where I am working now and the previous DBA have done the set up having 2 catalog database. I want view to check from target database, which can show the catalog database name to which it is connected to.
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Database not found/Error: ORA-16621: database name for ADD DATABASE must be

I am new to Data Guard and am trying to set up Data Guard Broker. I had created a configuration file with both my primary and standby databases and at one time I could show both databases. But now I can no longer show the standby database nor can I enable, disable or reinstate it. Here is what I have:
Primary Database: orcl10g
Standby Database: 10gSB
DGMGRL> show configuration
Configuration
Name: orcl10g
Enabled: YES
Protection Mode: MaxPerformance
Fast-Start Failover: DISABLED
Databases:
orcl10g - Primary database
10gSB - Physical standby database
Current status for "orcl10g":
SUCCESS
DGMGRL> show database verbose orcl10g
Database
Name: orcl10g
Role: PRIMARY
Enabled: YES
Intended State: ONLINE
Instance(s):
orcl10g
Properties:
InitialConnectIdentifier = 'orcl10g'
LogXptMode = 'ASYNC'
Dependency = ''
DelayMins = '0'
Binding = 'OPTIONAL'
MaxFailure = '0'
MaxConnections = '1'
ReopenSecs = '300'
NetTimeout = '180'
LogShipping = 'ON'
PreferredApplyInstance = ''
ApplyInstanceTimeout = '0'
ApplyParallel = 'AUTO'
StandbyFileManagement = 'AUTO'
ArchiveLagTarget = '0'
LogArchiveMaxProcesses = '30'
LogArchiveMinSucceedDest = '1'
DbFileNameConvert = '10gSB, orcl10g'
LogFileNameConvert = '/oracle/oracle/product/10.2.0/oradata/orcl10g/redo01.log, /oracle/oracle/product/10.2.0/oradata/10gSB/redo01.log, /oracle/oracle/product/10.2.0/oradata/orcl10g/redo02.log, /oracle/oracle/product/10.2.0/oradata/10gSB/redo02.log, /oracle/oracle/product/10.2.0/oradata/orcl10g/redo03.log, /oracle/oracle/product/10.2.0/oradata/10gSB/redo03.log'
FastStartFailoverTarget = ''
StatusReport = '(monitor)'
InconsistentProperties = '(monitor)'
InconsistentLogXptProps = '(monitor)'
SendQEntries = '(monitor)'
LogXptStatus = '(monitor)'
RecvQEntries = '(monitor)'
HostName = 'remarkable.mammothnetworks.com'
SidName = 'orcl10g'
LocalListenerAddress = '(ADDRESS=(PROTOCOL=tcp)(HOST=remarkable.mammothnetworks.com)(PORT=1521))'
StandbyArchiveLocation = '/oracle/flash_recovery_area/orcl10g/archivelog'
AlternateLocation = ''
LogArchiveTrace = '1024'
LogArchiveFormat = '%t_%s_%r.arc'
LatestLog = '(monitor)'
TopWaitEvents = '(monitor)'
Current status for "orcl10g":
SUCCESS
DGMGRL> show database verbose 10gSB
Object "10gsb" was not found
DGMGRL>
DGMGRL> remove database 10gSB
Object "10gsb" was not found
DGMGRL>
DGMGRL> reinstate database 10gSB
Object "10gsb" was not found
DGMGRL>
DGMGRL> enable database 10gSB
Object "10gsb" was not found
DGMGRL>
DGMGRL> add database '10gSB' as
connect identifier is 10gSB
maintained as physical;Error: ORA-16621: database name for ADD DATABASE must be unique
Failed.
How can I get Data Guard to see the standby database correctly again?

Thank you for the constructive feedback. I have been able to make progress on this issue.
I did check the Data Guard Log files as you suggested. I did not find anything when I checked them before but this time I found the following:
DG 2011-06-16-17:23:18 0 2 0 RSM detected log transport problem: log transport for database '10gSB' has the following error.
DG 2011-06-16-17:23:18 0 2 0 RSM0: HEALTH CHECK ERROR: ORA-16737: the redo transport service for standby database "10gSB" has an error
DG 2011-06-16-17:23:18 0 2 0 NSV1: Failed to connect to remote database 10gSB. Error is ORA-12514
DG 2011-06-16-17:23:18 0 2 0 RSM0: Failed to connect to remote database 10gSB. Error is ORA-12514
DG 2011-06-16-17:23:18 0 2 753988034 Operation CTL_GET_STATUS cancelled during phase 2, error = ORA-16778
DG 2011-06-16-17:23:18 0 2 753988034 Operation CTL_GET_STATUS cancelled during phase 2, error = ORA-16778
I verified that I am able to connect to both the primary and standby databases via external connections:
-bash-3.2$ lsnrctl status
LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 17-JUN-2011 12:41:03
Copyright (c) 1991, 2005, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date 17-JUN-2011 01:40:30
Uptime 0 days 11 hr. 0 min. 32 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /oracle/oracle/product/10.2.0/db_1/network/admin/listener.ora
Listener Log File /oracle/oracle/product/10.2.0/db_1/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=remarkable.mammothnetworks.com)(PORT=1521)))
Services Summary...
Service "10gSB" has 1 instance(s).
Instance "10gSB", status READY, has 1 handler(s) for this service...
Service "10gSB_DGB" has 1 instance(s).
Instance "10gSB", status READY, has 1 handler(s) for this service...
Service "10gSB_XPT" has 1 instance(s).
Instance "10gSB", status READY, has 1 handler(s) for this service...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "orcl10g" has 1 instance(s).
Instance "orcl10g", status READY, has 1 handler(s) for this service...
Service "orcl10gXDB" has 1 instance(s).
Instance "orcl10g", status READY, has 1 handler(s) for this service...
Service "orcl10g_DGB" has 1 instance(s).
Instance "orcl10g", status READY, has 1 handler(s) for this service...
Service "orcl10g_XPT" has 1 instance(s).
Instance "orcl10g", status READY, has 1 handler(s) for this service...
The command completed successfully
-bash-3.2$
-bash-3.2$
-bash-3.2$ sqlplus system/dbas4ever@orcl10g
SQL*Plus: Release 10.2.0.1.0 - Production on Fri Jun 17 12:43:41 2011
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
SQL> quit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
-bash-3.2$ sqlplus system/dbas4ver@10gSB
SQL*Plus: Release 10.2.0.1.0 - Production on Fri Jun 17 12:43:59 2011
Copyright (c) 1982, 2005, Oracle. All rights reserved.
ERROR:
ORA-01033: ORACLE initialization or shutdown in progress <== I think this is normal since the database is in mount mode
Enter user-name:
I also checked the listener log file and did see and error associated with a known bug:
WARNING: Subscription for node down event still pending
So I added the following to the listener.ora file and bounced the listener:
SUBSCRIBE_FOR_NODE_DOWN_EVENT_LISTENER=OFF
That seems to have taken care of the error.
The following is my listener.ora file:
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /oracle/oracle/product/10.2.0/db_1)
(PROGRAM = extproc)
(SID_DESC = ( GLOBAL_DBNAME = 10gsb_DGMGRL.remarkable.mammothnetworks.com )
( SERVICE_NAME = 10gsb.remarkable.mammothnetworks.com )
( SID_NAME = 10gsb )
( ORACLE_HOME = /oracle/oracle/product/10.2.0/db_1 )
(SID_DESC = ( GLOBAL_DBNAME = orcl10g_DGMGRL.remarkable.mammothnetworks.com )
( SERVICE_NAME = orcl10g.remarkable.mammothnetworks.com )
( SID_NAME = orcl10g )
( ORACLE_HOME = /oracle/oracle/product/10.2.0/db_1 )
(SID_DESC = ( GLOBAL_DBNAME = orcl10g.remarkable.mammothnetworks.com )
( SERVICE_NAME = orcl10g.remarkable.mammothnetworks.com )
( SID_NAME = orcl10g )
( ORACLE_HOME = /oracle/oracle/product/10.2.0/db_1 )
(SID_DESC = ( GLOBAL_DBNAME = 10gsb.remarkable.mammothnetworks.com )
( SERVICE_NAME = 10gsb.remarkable.mammothnetworks.com )
( SID_NAME = 10gsb )
( ORACLE_HOME = /oracle/oracle/product/10.2.0/db_1 )
SUBSCRIBE_FOR_NODE_DOWN_EVENT_LISTENER=OFF
I again tried connecting externally to the standby database:
-bash-3.2$ sqlplus system/dbas4ever@10gSB
SQL*Plus: Release 10.2.0.1.0 - Production on Fri Jun 17 13:09:00 2011
Copyright (c) 1982, 2005, Oracle. All rights reserved.
ERROR:
ORA-01033: ORACLE initialization or shutdown in progress
Enter user-name:
and see this in the listener.log file:
17-JUN-2011 13:10:22 * (CONNECT_DATA=(SERVICE_NAME=10gSB_XPT)(SERVER=dedicated)(CID=(PROGRAM=oracle)(HOST=remarkable.mammothnetworks.com)(USER=oracle))) * (ADDRESS=(PROTOCOL=tcp)(HOST=199.187.124.130)(PORT=11357)) * establish * 10gSB_XPT * 0
17-JUN-2011 13:10:22 * (CONNECT_DATA=(SERVICE_NAME=10gSB_XPT)(SERVER=dedicated)(CID=(PROGRAM=oracle)(HOST=remarkable.mammothnetworks.com)(USER=oracle))) * (ADDRESS=(PROTOCOL=tcp)(HOST=199.187.124.130)(PORT=11358)) * establish * 10gSB_XPT * 0
17-JUN-2011 13:10:24 * service_update * 10gSB * 0
17-JUN-2011 13:10:30 * (CONNECT_DATA=(SID=orcl10g)(CID=(PROGRAM=perl)(HOST=remarkable.mammothnetworks.com)(USER=oracle))) * (ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=25119)) * establish * orcl10g * 0
17-JUN-2011 13:10:30 * (CONNECT_DATA=(SID=orcl10g)(CID=(PROGRAM=perl)(HOST=remarkable.mammothnetworks.com)(USER=oracle))) * (ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=25120)) * establish * orcl10g * 0
17-JUN-2011 13:10:30 * (CONNECT_DATA=(SID=orcl10g)(CID=(PROGRAM=emagent)(HOST=localhost.localdomain)(USER=oracle))) * (ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=25121)) * establish * orcl10g * 0
17-JUN-2011 13:11:22 * (CONNECT_DATA=(SERVICE_NAME=10gSB_XPT)(SERVER=dedicated)(CID=(PROGRAM=oracle)(HOST=remarkable.mammothnetworks.com)(USER=oracle))) * (ADDRESS=(PROTOCOL=tcp)(HOST=199.187.124.130)(PORT=11420)) * establish * 10gSB_XPT * 0
17-JUN-2011 13:11:22 * (CONNECT_DATA=(SERVICE_NAME=10gSB_XPT)(SERVER=dedicated)(CID=(PROGRAM=oracle)(HOST=remarkable.mammothnetworks.com)(USER=oracle))) * (ADDRESS=(PROTOCOL=tcp)(HOST=199.187.124.130)(PORT=11422)) * establish * 10gSB_XPT * 0
17-JUN-2011 13:11:24 * service_update * 10gSB * 0
I tried again to see the database in Data Guard Broker:
DGMGRL> show database 10gSB
Object "10gsb" was not found
however, I then was able to add the database in Data Guard Broker:
DGMGRL> add database 10gSB
as connect identifier is 10gSB
maintained as physical;Database "10gsb" added <== this is progress!!!
However the configuration shows the following:
DGMGRL> show database 10gSB
Database
Name: 10gsb
Role: PHYSICAL STANDBY
Enabled: NO
Intended State: OFFLINE
Instance(s):
10gSB
Current status for "10gsb":
DISABLED <=====
So I tried to enable the database:
DGMGRL> enable database 10gSB
Error: ORA-16626: failed to enable specified object
Failed.
and I tried to reinstate the database:
DGMGRL> reinstate database 10gSB
Reinstating database "10gsb", please wait...
Error: ORA-16653: failed to reinstate database
Failed.
Reinstatement of database "10gsb" failed
So I checked the configuration and now see two entries for the standby database but with case differences:
DGMGRL> show configuration
Configuration
Name: orcl10g
Enabled: YES
Protection Mode: MaxPerformance
Fast-Start Failover: DISABLED
Databases:
orcl10g - Primary database
10gSB - Physical standby database
10gsb - Physical standby database (disabled)
Current status for "orcl10g":
SUCCESS
Question: How do I get rid of 10gSB and enable 10gsb?

DNS Alias not Updating on Communication Channel

Hi,
We use DNS Aliases when connecting to some of our servers. One interface connects to a server using FTP with alias FTPServer.
This FTPServer had a site switch over the weekend and the DNS Alias did not update in the communication channel. I had to ping the DNS Alias and put the server name into the CC to get the FTP to work.
Is there any way of getting PI 7.1 to refresh the DNS?
Thanks,
Gareth

Check out this intersting blog on aliasing.
[Controlling DNS caching in the Java Virtual Machine (i.e. J2EE WAS)|Controlling DNS caching in the Java Virtual Machine (i.e. J2EE WAS)]
I hope it might help
Regards
Ramesh

Renaming the Oracle10gXE database name

Hi,
Oralce10gXe
Linux Os
How to rename the database name from 'XE' (default) to for eg. 'TEST' ?
what are the exact steps for it ?
Regards

Hi,
it is possible to change the SID of XE like any other Oracle edition. The easiest way to do so is to use the nid (newid) utility in $ORACLE_HOME/bin (you shutdown the database cleanly, open in mount state and then execute nid target=sys/password@xe dbname=newSID, then change the dbname in init/spfile, rename the init/spfile to contain the new sid, generate new password file using passwd, and open the database with resetlogs).
However, I would not recommend renaming the XE database. I did that, and it has been a pain, since our developers changed the hardware several times, wished for new testing and development installations, and I had to play again and again with the changing of default oracle scripts. As with XE, you can run only one XE edition instance on the server (that does not change by renaming it). With that in mind, there are multiple oracle scripts with ORACLE_SID=XE hardcoded in them. Namely the /etc/init.d/oracle-xe, then all the scripts in $ORACLE_HOME/config/scripts related to starting/stopping and backing up the db, not forgetting the oracle_env.sh...
Having the experience, I would simply recommend leaving the ORACLE_SID=XE, and changing the service_name, or the TNSNAMES.ora alias. That should be sufficient for the developers to "see a pretty name".
Kind regards,
Martin

Global Database Name

Hi
what is the difference between Global database name followed by the domain name of the system and the Global database that itsn't?
and can I choose one name for ech of Global database name ,sid, and service_name
to make connection with oracle developer easy after installation?
Thanks in advance.

There are differences between global_name, sid and service_name. They may all have the same value, which causes confusion.
Whether you have the global name followed by the domain name or not it's the same, as long as it is a name that uniquely identifies your database in a network environment. This is a requirement when using replication. You could leave it with or without domain at creation time, you can change it any time, but it is a good practice to have it qualified.
The SID is the name of an Oracle Instance, i.e. the allocated shared memory plus the background processes, and it is unique within the scope of the OS where your database is running. You can create a connection string that uses the Instance name to connect to the database, but it is considered obsolete, and it was the way to connect to an Oracle database in releases 8.0 and previous.
Service name is a mean to group applications that get access to the database. It is related with an Oracle Instance. In a single instance environment there is not too much sense from the failover or load balance perspective, it can be interpreted as an alias for the instance and you can still group sessions by service, but in a multiple instance environment, named RAC, it can be used to migrate the service from one instance to another for the purposes of load balancing and failover, as well as for application affinity and resource allocation by means of resource manager.
~ Madrid
http://hrivera99.blogspot.com/

Can i rename the Global Database Name

Hi Seniors,
i have installed the Oracle 10.2.3(10203_vista_w2k8_x86_production_db) in my VISTA Laptop.
i have given the Global Database Name as orcsatya but i want to change to orasatya
would u please tell how to proccess if it is.....
thanks
Seenujanu

SeenuJanu wrote:
yes , i want the name from orcsatya to orasatya of Global Database Name
is it possible to change the Name or i have to reinstall
which i would like to access the names like
connecting scott/sathi@orasatya;
Thanks in Advance
Edited by: SeenuJanu on Jun 13, 2009 4:43 AMFor that you don't even need to touch the database. The name you use in your connect string is nothing more than an alias that is resolved (in your tnsnames.ora file) to a specific service name on a specific host. Without touching anything else, you could change your tnsnames entry from something like
ORASATYA =
(DESCRIPTION =
   (ADDRESS_LIST =
     (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
(CONNECT_DATA =
   (SERVICE_NAME = ORA11)
)to
fred =            <=== note that this is the only change from the previous entry
(DESCRIPTION =
   (ADDRESS_LIST =
     (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
(CONNECT_DATA =
   (SERVICE_NAME = ORA11)
)At which point you would connect with
sql> connect scott/sathi@fred

Service name and database name are different.

Hi,
I had created a database with name PROD, latter i changed DB name to PRODT as per management request.
But i notice the following things.
1. At OS level ORACLE_SID variable is still PROD.(.bash_profile too have this entries)
2. From sql prompt DB_NAME is PRODT.
3. In Listener service name is showing PRODT and instance name is PROD.
can any one please explain me, why oracle is behaving like this.
Our all the applications are working fine with out any issues till now.
[oracle@qual ~]$ echo $ORACLE_SID
PROD
[oracle@qual ~]$ sqlplus '/ as sysdba'
SQL*Plus: Release 10.2.0.1.0 - Production on Tue Mar 5 10:35:01 2013
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to an idle instance.
SQL> startup
ORACLE instance started.
Total System Global Area 608174080 bytes
Fixed Size 1220868 bytes
Variable Size 209719036 bytes
Database Buffers 394264576 bytes
Redo Buffers 2969600 bytes
Database mounted.
Database opened.
SQL> select name from v$database;
NAME
PRODT
SQL> !lsnrctl status
LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 05-MAR-2013 10:38:30
Copyright (c) 1991, 2005, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=qual.com)(PORT=1521)))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date 05-MAR-2013 10:36:54
Uptime 0 days 0 hr. 1 min. 35 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u001/app/oracle/product/10.2.0/network/admin/listener.ora
Listener Log File /u001/app/oracle/product/10.2.0/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=qual.com)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "PRODT" has 1 instance(s).
Instance "PROD", status READY, has 2 handler(s) for this service...
Service "PRODT_XPT" has 1 instance(s).
Instance "PROD", status READY, has 2 handler(s) for this service...
The command completed successfully
SQL> exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
[oracle@qual ~]$

Hello,
I had created a database with name PROD, latter i changed DB name to PRODT as per management request.Using NID ?
But i notice the following things.
1. At OS level ORACLE_SID variable is still PROD.(.bash_profile too have this entries)ORACLE_SID is the instance name. Changing DB name does not change the instance name. You can manually change it by creating a new PFILE/SPFILE and Password file for the new instance.
2. From sql prompt DB_NAME is PRODT.Yes, as you have changed the DB name from PROD to PRODT.
3. In Listener service name is showing PRODT and instance name is PROD.Database name is PRODT and the instance associated with it is PROD. There can be multiple instances for a single database.
Regards,
Shivananda

DNS Alias / Database name

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